Jung-yeon’s 6-year-old son Yoon-su disappeared in a playground near her home. It’s been 6 years since she and her husband Myeong-guk searched for him tirelessly. One day, Jung- yeon receives an encouraging tip from an unknown caller. The tipster provides detailed information about Yoon-su that wasn’t included on the missing person flyer, and she doesn’t hesitate to drive down to a fishing spot in the country. Upon arrival, she feels strange vibe from the owners and residents of the sleepy village where the fishing spot is located…..